Portion of a speaker housing



FIG. 1 is a perspective view of a portion of a speaker housing showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The broken line showing of the circle on top in FIG. 5 and the bottom portion in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a speaker housing, as shown and described. 